<template>
  <div class="song-list">
    <!--导航栏-->
    <van-nav-bar
      title="歌单详情"
      left-text="返回"
      left-arrow
      @click-left="onClickLeft"
    />
    <!--歌单首部-->
    <div class="header">
      <img :src="song.logo" alt="" />
      <h4>{{ song.dissname }}</h4>

      <div class="nick">
        <img :src="song.headurl" alt="" />
        <span>{{ song.nickname }}</span>
      </div>
      <span>播放量:{{ song.visitnum | numFilter(1) }}万</span>
    </div>
    <!--歌单列表-->
    <div class="list">
      <van-list
        v-model="loading"
        :finished="finished"
        finished-text="没有更多了"
        @load="onLoad"
      >
        <div
          v-for="(item, index) in list"
          :key="index"
          :title="item"
          class="song"
        >
          <h3>{{ item.songname }}</h3>

          <div class="singers">
            <span v-for="(singer, index) in item.singer" :key="singer.id">
              {{ singer.name }}
              <span v-show="index != item.singer.length - 1">/</span>
            </span>
            <span v-show="item.albumname">
              <span>.</span>
              <span>{{ item.albumname }}</span>
            </span>
          </div>
        </div>
      </van-list>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      song: {
        dissname: "",
        logo: "",
        headurl: "",
        nickname: "",
        visitnum: 0,
      },
      songlist: [],
      songnum: 0,
      list: [],
      loading: false,
      finished: false,
    };
  },
  created() {
    this.getListData();
  },
  methods: {
    getListData() {
      this.$request("get", "/songlist", {
        id: this.$route.params.id,
      }).then((res) => {
        console.log(res);
        this.song.dissname = res.data.dissname;
        this.song.logo = res.data.logo;
        this.song.headurl = res.data.headurl;
        this.song.nickname = res.data.nickname;
        this.song.visitnum = res.data.visitnum;
        this.songlist = res.data.songlist;
        this.songnum = res.data.songnum;
      });
    },
    onClickLeft() {
      //
      window.history.length > 1 ? this.$router.go(-1) : this.$router.push("/");
    },
    onLoad() {
      setTimeout(() => {
        this.list = this.list.concat(this.songlist.splice(0, 10));
        this.loading = false;
        if (this.list.length >= this.songnum) {
          this.finished = true;
        }
      }, 1000);
    },
  },

  filters: {
    //处理播放量的显示格式（万和小数点）
    numFilter(value, num) {
      return parseFloat(value / 10000).toFixed(num);
    },
  },
};
</script>
<style scoped>
.header > img {
  width: 50%;
}
.nick {
  overflow: hidden;
}
.nick > img {
  width: 1.5rem;
  border-radius: 50%;
  margin-right: 0.5rem;
}
.nick > span {
  height: 2rem;
  display: inline-block;
  vertical-align: middle;
  font-size: 0.8rem;
}
.header > span {
  font-size: 0.9rem;
}
.song {
  margin-bottom: 1rem;
}
.song > h3 {
  text-align: left;
  font-size: 1rem;
  padding: 0 2rem;
  margin: 0;
}
.singers {
  text-align: left;
  padding: 0 2rem;
}
.singers span {
  font-size: 0.8rem;
  color: gray;
}
.singers > span:nth-last-child(1) > span:nth-child(1) {
  margin: 0 0.3rem;
  font-weight: 900;
  color: red;
}
</style>